Nannaria "Natchez Trace", 2021

Means, Jackson C., Hennen, Derek A. & Marek, Paul E., 2021, A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae), ZooKeys 1030, pp. 1-180 : 1

Nannaria "Natchez Trace" incertae sedis Fig. 121

Material examined.

United States - Tennessee • 3 ♂♂ and 4 ♀♀; Henderson County, Natchez Trace St. Pk. , Fern Nature Trail ; 35.7966°N, - 88.2646°W; 26 May 1980; R. Shelley leg.; NCSM NAN0540. For detailed collection data see Suppl. material 7 .

Hypothesized placement.

Nannaria "Natchez Trace" specimens are hypothesized to be closely related to Nannaria "Claytor Lake" based on the following combination of gonopodal characters: Acropodite robust, curving medially with extended distal zone. Acropodite tip simple, laterally compressed (Fig. 121B , red triangle), directed posteromedially. Nannaria "Natchez Trace" specimens differ from Nannaria "Claytor Lake" based on the following combination of gonopodal characters: Prefemoral process pronounced, acicular, not reduced as in "Claytor Lake." Seminal groove continually curving towards tip, without small undulation as in "Claytor Lake" (Fig. 121A , red arrow).

Figures

Figure 121. Nannaria " Natchez Trace " incertae sedis ♂ (NCSM, NAN 0540) left gonopod A anterior view; red arrow indicates smoothly curving prostatic groove B medial view, slightly rotated to show laterally compressed acropodite tip, red triangle C posterior view. Scale bar: 0.5 mm.